Yes, moissanite is a 9.25-9.5 on the Mohs scale, whereas Sapphire is only a 9.
Moissanite doesn't really occur naturally on Earth though (although it is believed to form around carbon-rich stars).
Moissanite doesn't really occur naturally on Earth though (although it is believed to form around carbon-rich stars).
It seems misleading to call sapphire "THE" hardest next to diamond when there is another harder material that we can produce using a similar processes.